Perhaps you should try some spelling variations:
"literature arab _ plan." » "literatura arabe _ plan.", "literature early _ plan.", "literatura para _ plan."
"literatura del del islam." » "literatura de del islam.", "literatura en del islam.", "literatura edel del islam.", "literatura del de islam.", "literatura del dem islam."
"literatura el el islam." » "literatura en el islam.", "literatura e el islam.", "literatura de el islam.", "literatura es el islam."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("literatura el el islam.") or ("literatura del del islam."))) or ("literature arab _ plan."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura el el islam.") OR ("literatura del del islam."))) OR ("literature arab _ plan.")).
• Removing quotes may allow a broader search: (((( literatura el el islam. ) or ( literatura del del islam. ))) or ( literature arab _ plan. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura el el islam.") or ("literatura del del islam."))) or ("literature arab _ plan."))*.